Commit | Line | Data |
---|---|---|
0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef STRUCTH | |
4 | #define STRUCTH | |
7dc6e754 | 5 | /* Copyright (C) 1995, 1997 Free Software Foundation, Inc. |
0f2d19dd JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
20 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
21 | * |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
82892bed | 44 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
45 | \f |
46 | ||
b4309c3c | 47 | #include "libguile/__scm.h" |
bafcafb2 | 48 | #include "libguile/print.h" |
0f2d19dd JB |
49 | |
50 | \f | |
51 | ||
2c36c351 | 52 | /* Number of words with negative index */ |
14d1400f | 53 | #define scm_struct_n_extra_words 3 |
2c36c351 | 54 | |
0f2d19dd | 55 | /* These are how the initial words of a vtable are allocated. */ |
f40f662e | 56 | #define scm_struct_i_proc -7 /* Optional procedure slots */ |
4bfdf158 MD |
57 | #define scm_struct_i_ptr -3 /* start of block (see alloc_struct) */ |
58 | #define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ | |
59 | #define scm_struct_i_tag -1 /* A unique tag for this type.. */ | |
f40f662e | 60 | #define scm_struct_i_flags -1 /* Upper 8 bits used as flags */ |
4bfdf158 MD |
61 | #define scm_vtable_index_layout 0 /* A symbol describing the physical arrangement of this type. */ |
62 | #define scm_vtable_index_vcell 1 /* An opaque word, managed by the garbage collector. */ | |
63 | #define scm_vtable_index_vtable 2 /* A pointer to the handle for this vtable. */ | |
64 | #define scm_vtable_index_printer 3 /* A printer for this struct type. */ | |
65 | #define scm_vtable_offset_user 4 /* Where do user fields start? */ | |
0f2d19dd | 66 | |
f40f662e | 67 | #define SCM_STRUCTF_ENTITY (1L << 30) /* Indicates presence of proc slots */ |
0f2d19dd JB |
68 | |
69 | #define SCM_STRUCTP(X) (SCM_TYP3(X) == scm_tc3_cons_gloc) | |
70 | #define SCM_STRUCT_DATA(X) ((SCM*)(SCM_CDR(X))) | |
71 | #define SCM_STRUCT_VTABLE_DATA(X) ((SCM *)(SCM_CAR(X) - 1)) | |
4bfdf158 MD |
72 | #define SCM_STRUCT_LAYOUT(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_layout]) |
73 | #define SCM_STRUCT_VTABLE(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_vtable]) | |
74 | #define SCM_STRUCT_PRINTER(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_printer]) | |
2c36c351 MD |
75 | /* Efficiency is important in the following macro, since it's used in GC */ |
76 | #define SCM_LAYOUT_TAILP(X) (((X) & 32) == 0) /* R, W or O */ | |
0f2d19dd JB |
77 | |
78 | ||
79 | \f | |
0f2d19dd | 80 | |
f40f662e MD |
81 | extern SCM *scm_alloc_struct SCM_P ((int n_words, int n_extra, char *who)); |
82 | extern void scm_struct_init SCM_P ((SCM handle, int tail_elts, SCM inits)); | |
1cc91f1b JB |
83 | extern SCM scm_make_struct_layout SCM_P ((SCM fields)); |
84 | extern SCM scm_struct_p SCM_P ((SCM x)); | |
85 | extern SCM scm_struct_vtable_p SCM_P ((SCM x)); | |
86 | extern SCM scm_make_struct SCM_P ((SCM vtable, SCM tail_array_size, SCM init)); | |
87 | extern SCM scm_make_vtable_vtable SCM_P ((SCM extra_fields, SCM tail_array_size, SCM init)); | |
88 | extern SCM scm_struct_ref SCM_P ((SCM handle, SCM pos)); | |
89 | extern SCM scm_struct_set_x SCM_P ((SCM handle, SCM pos, SCM val)); | |
90 | extern SCM scm_struct_vtable SCM_P ((SCM handle)); | |
91 | extern SCM scm_struct_vtable_tag SCM_P ((SCM handle)); | |
bafcafb2 | 92 | extern void scm_print_struct SCM_P ((SCM exp, SCM port, scm_print_state *)); |
1cc91f1b | 93 | extern void scm_init_struct SCM_P ((void)); |
0f2d19dd JB |
94 | |
95 | #endif /* STRUCTH */ |